Oldest Water Clock Illustration #3
by Science Source
Title
Oldest Water Clock Illustration #3
Artist
Science Source
Medium
Photograph - Photograph
Description
The oldest printed illustration of a water clock (clepsydras) in any culture, from a Sung edition of the Liu Ching T'u of Yang Chia (c A.D. 1155), enlarged by Mao Pang-Han (c. A.D. 1170). This is "Mr. Wang's lotus clepsydra", i.e., the design of Wang P'u (c. 1135), which includes an overflow tank and an occlusive indicator-rod.
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March 7th, 2013
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